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一般人认为,花卉的营养就是来自肥料,其实不然。花卉所需要的营养元素大部分来自空气和水中,还有一部分存在于土壤中。构成植物体有机物质的主要元素有氦、氢、氧、碳;构成灰分的元素主要有磷、钾、钙、镁、铁、硫。在正常情况下,只有氮、磷、钾需要大量补充。此外还有硼、锰、锌、铜、钼也是花卉生长和发育所必需的,但土壤中的含量完全能够满足花卉的需要。花卉栽培中常用的肥料可分为以下两大类:
Most people think that the nutrition of flowers comes from fertilizer, but it is not. Most of the nutrients needed for flowers come from the air and water, and some are found in the soil. The main elements that make up the plant organic matter are helium, hydrogen, oxygen and carbon. The elements that make up the ash are mainly phosphorus, potassium, calcium, magnesium, iron and sulfur. Under normal circumstances, only nitrogen, phosphorus and potassium need to be supplemented in large quantities. In addition there are boron, manganese, zinc, copper, molybdenum is also necessary for the growth and development of flowers, but the content of the soil can fully meet the needs of flowers. Fertilizer commonly used in flower cultivation can be divided into the following two categories: